3 — PROGRAMMABLE PARAMETERS
Curtis Model 1351 – December 2018
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pg. 62
PARAMETER ALLOWABLE RANGE DEFAULT DESCRIPTION
Type
Half_Bridge_X_Mode
Parameter’s CAN Index by Half_
Bridge_X_Mode
11 = 0x30F0 0x00
12 = 0x30F1 0x00
Low-Side
High-Side
0
1
Low-Side
0
0 = Low-side driver (connects the load to B−/ground)
1 = High-side driver (connects the load to B+/battery)
X= 11 or 12 for the VCL name Half_Bridge_X_Mode
In the Low-side mode, the load must be connected between the
driver and B+. The driver “sinks” current.
In the High-side mode, the load must be connected between the
driver and B−. The driver “sources” current.
Ramp Up
Driver_X_Ramp_Up_Time
Parameter’s CAN Index by
Driver_X_Ramp_Up_Time
11 = 0x313A 0x00
12 = 0x313B 0x00
0 – 10000 ms
0 – 10000
8 ms
8
The time in milliseconds to go from the minimum to the
maximum control mode type, as a linear ramp-up.
X= 11 or 12 for the VCL name Driver_X_Ramp_Up_Time
Direct PWM: This is the time to change the pulse
width modulation percentage
Voltage Comp: This is the time to change the average
voltage.
Current Cntrl: This is time to change the current
between the minimum and maximum
driver current setting.
A value of 0 milliseconds disables any ramping, resulting in a
step-function-change when the driver command increases.
Note that this Ramp Up is not applied in the Initial Level
parameter.
Ramp Down
Driver_X_Ramp_Down_Time
Parameter’s CAN Index by
Driver_X_Ramp_Down_Time
11 = 0x314A 0x00
12 = 0x314B 0x00
0 – 10000 ms
0 – 10000
8 ms
8
The time in milliseconds to go from the minimum to the
maximum control mode type, as a linear ramp-down.
X= 11 or 12 for the VCL name Driver_X_Ramp_Down_Time
Direct PWM: This is the pulse width percentage.
Voltage Comp: This is nominal voltage percentage.
(Note, Coil Return = B+ voltage)
Current Cntrl: This is percentage between the maximum
and minimum driver current setting
(See the Current Control parameters menu,
below)
A value of 0 millisecond disables any ramping resulting in a
step-function-change when the driver command decreases or is
stopped (Driver_11_Command = 0).
OUTPUTS — HALF-BRIDGE DRIVERS, cont’d
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